/Engine/Source/Developer/MeshUtilities/Public/MeshUtilities.h
bool GenerateUniqueUVsForStaticMesh ( const [FRawMesh](API\Runtime\RawMesh\FRawMesh) & RawMesh, int32 TextureResolution, bool bMergeIdenticalMaterials, [TArray](API\Runtime\Core\Containers\TArray)< FVector2f > & OutTexCoords ) const